Dozer for a farm tractor

ABSTRACT

A dozer for a farm tractor which includes a blade pivotally mounted at one end to one leg of a substantially U-shaped blade frame, and an extension arm selectively interconnected pivotally between the other blade end and the other leg of the blade frame to pivot and angularly dispose the blade toward one side of the tractor. The extension arm is selectively located in a reserve position between the blade and blade frame when the arm is not in use and when the said other blade end is attached to the said other leg. The extension arm is pivotally attached at one of a pair of longitudinally spaced, front and rear connection points, and the said other blade end and said other leg are attached at the other connection point when the extension arm is selectively pivoted behind the blade in the reserve position. A bearing means, pivotally connecting the bight of the blade frame to the chassis frame, includes a journal carried by a support plate at each side of the chassis frame, the journals pivotally mounting the bight. Pivot means mounts one journal to its associated support plate about a pivot axis, while means movably mount the other journal to its support plate, whereby the blade can tilt about the pivot axis of said one journal.

United States Patent [72] Inventors Kyle E. Terrell;

Darryl C. Rester, Yazoo City, Miss. [21] Appl. No. 661,607 22 Filed Aug. 18,1967 [45] Patented May 25, 1971 [73] Assignee Amco International Yazoo City, Miss.

[54] DOZER FOR A FARM TRACTOR 15 Claims, 7 Drawing Figs.

[52] US. Cl 172/805, 172/806 [51] Int. Cl E02f 3/76 [50] Field of Search 172/805, 804, 801, 276,277, 807, 806, 802, 803, 273, 809

[56] References Cited UNITED STATES PATENTS 2,927,388 3/1960 Skromme et al 172/804 2,967,364 1/1961 Warner et al 172/805 3,199,236 8/1965 Bartel et a]. 172/806 Primary Examiner-Robert E. Bagwill Assistant Examiner-Stephen C. Pellegrino Att0rneyCohn & Powell ABSTRACT: A dozer for a farm tractor which includes a blade pivotally mounted at one end to one leg of a substantially U-shaped blade frame, and an extension arm selectively interconnected pivotally between the other blade end and the other leg of the blade frame to pivot and angularly dispose the blade toward one side of the tractor. The extension arm is selectively located in a reserve position between the blade and blade frame when the arm is not in use and when the said other blade end is attached to the said other leg. The extension arm is pivotally attached at one of a pair of longitudinally spaced, from and rear connection points, and the said other blade end and said other leg are attached at the other connection point when the extension arm is selectively pivoted behind the biade in the reserve position. A bearing means, pivotally connecting the bight of the blade frame to the chassis frame, includes a journal carried by a support plate at each side of the chassis frame, the journals pivotally mounting the bight. Pivot means mounts one journal to its associated support plate about a pivot axis, while means movably mount the other journal to its support plate, whereby the blade can tilt about the pivot axis of said one journal.

PATENTEDMAYZSIBII 3580,3 11

SHEET 1 UF 2 FIG. 1

INVENTORS KYLE E. TERRELL DARRELL CHESTER ATTORNEYS PATENTEU NAYZSIHYI 3580.341

' sum 2 OF 2 FIG. 5

FIG. 7

FIG. 4

FIG. 6

INVENTORS:

KYLE E. TERRELL' DARRELL RESTER an MPMwz ATTORNEYS DOZER FOR A FARM TRACTOR BACKGROUND OF THE INVENTION This invention relates generally to improvements in a dozer for a farm tractor, and more particularly to improved mechanism for selectively adjusting the blade position.

In the heretofore conventional dozers of this type, such as is disclosed in U.S. Pat. No. 3,199,236, the blade is rigidly fixed to its blade frame so as to preclude angular adjustment toward one side or the other of the tractor. There is no built-in structure adapted to change the blade angle readily upon a simple adjustment involving only a single connection.

Moreover, the prior dozers of this type enable the blade frame, and hence the blade, to be lifted or raised vertically about a transverse, substantially horizontal axis, but such dozers do not provide any bearing means between the blade frame and chassis frame capable of being selectively adjusted to tilt the blade frame and the blade from one end to the other end upon adjustment of the cooperating parts by raising or lowering one journal at one side of the chassis frame about a pivot axis defined by another journal at the opposite side of the chassis frame. To change the angular disposition of a dozer blade either sideways or endwise, if such change could be accomplished, would require the assistance of several persons using jacks or lifting bars and would require the changing of complicated linkage by adding or removing parts and the adjustment of a multiplicity of parts. This kind of adjustment is difficult and time-consuming, and necessitates an inventory and separate storage of additional parts not being used at any one time, but which are needed under some circumstances.

SUMMARY OF THE INVENTION The dozer incorporates an extension arm at either one or both ends of the blade which can be selectively utilized to extend one blade end forwardly about a pivot mounting of the opposite blade end, whereby to dispose the blade angularly toward one side or the other of the tractor. This angular adjustment of the blade is accomplished quickly and easily by disconnecting the one blade end from its associated blade frame, and by swinging the extension arm from its folded, reserve position to its operative extended position for interconnection between the blade frame and blade.

The blade frame is of substantially U-shape having a bight and two legs. The bight is pivotally mounted by bearing means to the chassis frame, while the legs are operatively attached to the blade. The extension arm is selectively interconnected between a blade end and an adjacent leg to pivot and angularly dispose the blade, and is selectively swung to and located in a reserve position between the blade and adjacent leg when not in use.

The blade ends are attached to the legs to provide a space therebetween to receive the extension arm when the extension arm is selectively pivoted and folded about its pivot connection to the reserve position behind the blade.

The means attaching the blade end to the associated leg includes a pair of longitudinally spaced, front and rear connection points. The extension arm is pivotally attached at one of the connection points, while the blade end and leg are attached at the other associated connection point, when the extension arm is selectively pivoted behind the blade in the reserve position.

A journal is carried by a support blade at each side of the chassis frame, the journals pivotally mounting the bight of the blade frame to the chassis frame. One journal is pivotally mounted to its associated support plate about a pivot axis extending generally in the direction of the longitudinal axis of the dozer, while the other journal is movably mounted to its associated support plate to enable the blade to tilt end to end about the pivot axis. The means mounting the journals are readily adjustable to enable such angular tilting of the blade. The desired angular disposition is attained easily by a manipulating means operatively interconnected between the chassis frame and the said other journal for selectively pivoting the blade about the pivot axis of said one journal.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational view of the dozer mounted on a farm tractor;

FIG. 2 is a top plan view of the dozer;

FIG. 3 is a fragmentary, top plan view showing the blade angularly disposed toward one side of the tractor;

FIG. 4 is a front view of the blade tilted end to end from the horizontal;

FIG. 5 is a front view of the bearing means interconnecting the blade frame and chassis frame;

FIG. 6 is a fragmentary side view of the bearing means shown in FIG. 5, and

FIG..7 is an enlarged cross-sectional view taken on line 7-7 of'FIG. 5.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now by characters of reference to the drawings,

and first to FIG. I, it will be understood that a dozer generally indicated by 10 is mounted on a farm tractor referred to by 11. The farm tractor 11 is conventional and includes a body 12 supported by large rear ground wheels 13 and relativelyv smaller, front ground wheels 14. The tractor body 12 includes a body frame 15.

The dozer 10 includes a chassis frame 16 attached to and carried by the tractor body frame 15. Specifically, the chassis frame 16 has a pair of laterally spaced side arms 17, as best shown in FIG. 2, interconnected at their rear ends by a cross brace 20. Attached to the rear end of each arm 17, adjacent the cross brace 20, is a bracket 21 that is selectively fastened to the tractor body frame 15.

Extending between and attached to the front ends of the side arms 17, is a channel, constituting a transverse brace 22. A pair of coacting brackets 23 and 24, interconnected by fasteners 25, are secured to the transverse brace 22 in laterally spaced relation. The uppermost bracket 24 of each cooperating pair of brackets 23-24 is mounted to the tractor body frame 15. The rear brackets 21 and the front brackets 24 maintain the chassis frame 16 in a substantially horizontal plane immediately below the tractor body 12 and between the ground wheels 13 and 14.

A blade frame generally indicated by 26 is located forwardly of and is carried by the chassis frame 16. The blade frame 26 is of generally U-shape having a bight 29 and integral, laterally spaced legs 27 and 28 extending forwardly on opposite sides of the front wheels 14. Attached to the front end of each leg 27 and 28 is a substantially vertical post 30 and 31, respectively. Each post 30 and 31 is reinforced by a brace 32 extending between and attached to the upper end of each post and the associated leg. Extending between the posts 30 and 31 and extending between the front ends of the legs 27 and 28, is a front brace 33. Corner braces 34 interconnect the ends of the front brace 33 with the associated legs 27 and 28.

The chassis frame 16 and the blade frame 26 are operatively and pivotally interconnected by a bearing means. This bearing means includes a substantially vertical support plate 35 attached to the front end of one side arm 17 of the chassis frame 16, the support plate 35 being reinforced by gussets 36. A similar support plate 37 is attached to and carried by the front end of the other side am 17 of the chassis frame 16, the support plate 37 being reinforced by gussets 38. Extending between and interconnecting the support plates 35 and 37 is a transverse channel 40.

A journal 41 and 42 is carried by the support plates 35 and 37 respectively, and pivotally support the bight 29 of the blade frame 26. The journal 41 includes a rear journal part 43 having front faces 44 interconnected by an intermediate, semicircular socket face 45. The journal part 43 includes a rear flange 46 contiguous to the support plate 35. A second journal part 47 provides rear faces 50 interconnected by an intermediate, semicircular socket face 51. When assembled, the faces 44 and 50 of the cooperating journal parts 43 and 47 respectively, are secured together by a plurality of bolts 52, while the matching socket faces 45 and 51 pivotally receive the bight 29 of the blade frame 26.

The flange 46 is clamped to the support plate 35 below the pivot axis of bight 29 defined by journal 41, by a pivot bolt 53 constituting a fastener. Another bolt 54, constituting a cooperating fastener, clamps the flange 46 to its support plate 35 above the pivot axis of bight 29 defined by journal 41. The bolt 54 passes through a substantially horizontal slot 55 formed in the support plate 35 which enables the coacting bolt 54 to move between limits in a substantially horizontal direction as the journal 41 is pivoted slightly about the pivot axis defined by the pivot bolt 53.

The other journal 42 includes a journal part 56 having front faces 57 interconnected by an intervening, semicircular socket face 60. The journal part 56 includes a side flange 61 located contiguous to the support plate 37. A cooperating journal part 62 includes rear faces 63 interconnected by an intervening, semicircular socket face 64. When the journal parts 56 and 62 are assembled, the faces 57 and 63 interengage and are clamped together by a plurality of bolts 65. The cooperating socket faces 60 and 64 pivotally receive and mount the bight 29 of the blade frame 26.

The flange 61 and the support plate 37 are operatively interconnected by a. fastener which includes a bolt 66 and cooperating nut 67. The bolt 66 extends through a pair of substantially vertical slots 70 and 71 formed respectively in the flange 61 and support plate 37. The bolt 66 is provided with a plate head 72 that is larger in dimension than the underlying slot 70 and which engages the flange 61.

When the bight 29 of blade frame 26, and hence the pivot axis of the blade frame 26, is substantially horizontal, the slots 70 and 71 are substantially in alignment, and the cooperating bolt 66 is located substantially midway in the aligned slots 70 and 71 on the'pivot axis of bight 29. At the same time, the bolt 54 is located substantially midway in its coacting, substantially horizontal slot 55. Upon pivoting, the journals 41 and 42 about the pivot axis defined by pivot bolt 53, the blade frame 26 can be tilted from one end to the other in either direction. The movement of the bolt 66 in the coacting slots 70 and 71 will permit the associated journal 42 to, move upwardly or downwardly a substantially equal distance more than the length of either slot 70 or 71. The movement of the bolt 54 in its cooperating horizontal slot 55 will permit such pivotal movement about the pivot bolt 53. The purpose of such angular disposition of the blade frame 26 will be later described in detail.

A jackscrew manipulator indicated by 73 is operatively connected between one of the mounting brackets 23 and the journal 42, the manipulator 73 being adapted to raise or lower the journal 42 incident to tilting the blade frame 26 to the desired angular disposition. The jackscrew manipulator 73 includes an internally threaded cylinder 74 disposed vertically and mounted to bracket 23 by an arm 75. A screw 76 is threadedly received in the cylinder 74. The lower end of screw 76 is mounted by yoke 77 to a lug 78 extending upwardly from the journal part 56. The upper end of screw 76 carries a handle 80. Upon turning the screw 76 in one direction the screw 76 will be extended out bottom of the cylinder 74, whereby to lower the journal 42 with respect to its associated support plate 37. The journal 42 will be raised relative to its associated support plate 37 by turning the screw 76 in the opposite direction.

A dozer blade 81 is mounted on and carried by the blade frame 26. More particularly, attachment brackets 82 and 83 are used to secure the blade 81 to the ends of legs 27 and 28 respectively. Each of the attachment brackets 82 and 83 is provided with a pair of longitudinally spaced connection points 84 and 85. In the preferred embodiment, the attachment brackets 82 and 83 are secured to and carried by the blade 81 and extend rearwardly therefrom. To hold the blade 81 rigidly and substantially at a right angle to the longitudinal axis of the dozer, the attachment plates 82 and 83 are secured to the posts and 31 respectively by suitable fastening means (not numbered) which can be pivot pins, at the connection points 84. When attached in this manner, a space is provided between the rear of blade 81 and the front ends of legs 27 and Received in the space provided between the blade 81 and the ends of legs 27 and 28, is an extension arm 86. One end of the extension arm 86 is pivoted at the connection point 85 to the attachment bracket 83. FIG. 2 illustrates the extension arm 86 in its folded, reserve position behind the blade 81. It will be understood that another extension arm can be pivotally attached at the connection point 85 of the other attachment bracket 82, if desired.

To extend the blade 81 angularly toward one side of the tractor, the fastener at connection point 84 connecting the attachment bracket 83 to leg 28, is removed. Then, the extension arm 86 is swung from its folded reserve position shown in FIG. 2 to its extended position shown in FIG. 3. When fully extended, the extension arm 86 overlaps the connection point 84 of the attachment bracket 83, and the outer end of the extension arm 86 is connected by a suitable fastener 87 (FIG. 3) to the post 31 at the front end of leg 28. As the blade 81 is angularly related by extending the extension arm 86, the blade 81 pivots about the pivot connection provided at the connection point 84 of the attachment bracket 82. The blade 81 can be returned from its angular disposition shown in FIG. 3 to its straight position perpendicular to the longitudinal axis of the dozer shown in FIG. 2 by disconnecting the end of the extension arm 86 from the post 31 by removing fastener 87, and then swinging the extension arm 86 to its reserve position behind blade 81. Then, the blade 81 can be pivoted about its fastener at connection point 84 on bracket 82 so that the bracket 83 can be fastened to the post 31 at its associated connection point 84.

It will be understood that the blade 81 can be angularly related toward the opposite side of the tractor by the placement of an extension arm at the opposite end of the blade 81 in association with the attachment bracket 82. In this event, the steps for placing the blade 81 in its angular disposition will be similar to those previously described.

It is thought that the functional advantages of the dozer have become fully apparent from the foregoing detailed description of parts, but for completeness of disclosure, the operation will be briefly described. First, the dozer is assembled by pivotally mounting the bight 29 of the blade frame 26 in the journals 41 and 42, and the bearing means is adjusted so that the slots 70 and 71 are aligned and so that the coacting bolt 66 is located midway in such aligned slots 70 and 71. In addition, the blade 81 is attached to the legs 27 and 28 at the connection points 84 of the attachment brackets 82 and 83 respectively so that the blade 81 extends transversely at a right angle to the longitudinal axis of the dozer.

The dozer is then attached to the tractor 11 by placing the blade frame 26 about the front tractor wheels 14, with the blade 81 located forwardly of such wheels 14. The chassis frame 16 is attached to the tractor body frame 14 by connection of the rear brackets 21 and forward brackets 24.

Elevation of the blade 81 is controlled by a hydraulic cylinder 88 extending between and operatively interconnecting one side arm 17 of the chassis frame 16 with an elevator arm 90 that is fixed to and extends upwardly from the bight 29 of the blade frame 26. As is shown in FIG. 2, the elevator arm 90 is reinforced by gusset plates 91. Upon extension of the hydraulic cylinder 88, the blade frame 26 and hence the blade 81 is lowered. Upon contraction of the hydraulic cylinder 88, the blade frame 26 is raised about its pivot axis defined by the rs ounting of bight 29 in journals 41 and 42 to raise the blade If it is desired to dispose the blade 81 toward one side of the tractor, the blade end carrying the extension arm 86 is detached from the post 31 of leg 28 at connection point 84, and the extension arm 86 is swung outwardly from its folded, reserve position shown in FIG. 2 to its fully extended position shown in FIG. 3. The outer end of extension arm 86 is fixed to the post 31 by a suitable fastener 87. The blade 81 can be returned to its initial position on detachment of the extension arm 86 and by folding the arm 86 to its reserve position between the blade 81 and the legs 27 and 28.

If it is desired to tilt the blade 81 from one end to the other as suggested in FIG. 4, the nuts 53, 54 and 66 are loosened, and then the jackscrew manipulator 73 is actuated to raise or lower the journal 42, and hence swing the blade frame 26 about the axis defined by pivot bolt 53, to bring the blade 81 to the desired angular position. When the blade 81 is located, the nuts 53, 54 and 66 are tightened to clamp the journals 41 and 42 to their respective support plates 35 and 37.

We claim:

1. A dozer fora farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame member having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame-to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. a blade member,

g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members, and pivoting one end of the blade to one leg of the blade frame,

h. another attachment means between the blade member and the blade frame member, said other attachment means being carried by one of said members, and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the fonavard direction of travel, said other end of the blade member and said other leg of the blade frame member being attached to one of said connection points in an initial blade position, and

. an extension arm pivotally connected to the other of said connection points, said arm being held in a reserve position in said initial blade position and said arm interconnecting said other end of the blade member and said other leg of the blade frame member to angularly dispose and hold the blade member to one side of the tractor in a blade extended position.

A dozer for a farm tractor, comprising:

a chassis frame, means adapted to attach the chassis frame to the tractor, a substantially U-shaped blade frame member having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. a blade member,

g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members and attaching one end of the blade member to one leg of the blade frame member, said attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said one end of the blade member and said one of the blade frame member being attached to one of said connection points in an initial blade position,

. another attachment means between the blade member and the blade frame member, said other attachment means being carried by one of said members and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced front and rear connection points, said other end of the blade member and said other leg of the blade frame member being attached to one of said connection points of said other attachment means in said initial blade position,

. an extension arm pivotally connected to the other of the connection points of one of said attachment means, said arm being held in a reserve position in said initial blade position and said arm interconnecting the other end of the blade member and the other leg of the blade frame member to angularly dispose and hold the blade to one side of the tractor in a blade extended position, and

j. the longitudinal distance between each associated pair of connection points being sufficient to provide a space between the blade and legs to receive the extension arm when folded to the reserve position.

3. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame member having a bight and two legs,

dI bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. a blade member,

g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members and attaching one end of the blade member to one leg of the blade frame member, said attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said one end of the blade member and said one leg of the blade frame member being attached to the rear connection point in an initial blade position,

h. another attachment means between the blade member and the blade frame member, said other attachment means being carried by one of said members and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said other end of the blade member and said other leg of the blade frame member being attached to the rear connection point of said other attachment means in said initial blade position,

i. an extension arm pivotally connected to the front connection point of one of said attachment means, said arm being held in a reserve position in said initial blade position and said arm interconnecting the other end of. the blade member and the other leg of the blade frame member to angularly dispose and hold the blade to one side of the tractor in a blade extended position,

j. the longitudinal distance between each associated pair of connection points being sufficient to provide a space between the blade member and legs to receive the extension arm when folded to the reserve position, and

k. the extension arm overlapping the associated rear connection point and being attached to the associated leg when the said associated leg and blade member end are detached at the rear connection point and when the blade member end is extended by the extension arm.

4. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a blade frame,

d. bearing means pivotally connecting the blade frame to the chassis frame,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. the bearing means including: v

1. a support means at each side of the chassis frame,

2. a journal carried by each support means, thejournals pivotally connecting the blade frame to the chassis frame,

3. means pivotally mounting one journal to its associated support means about a pivot axis, and

4. means. movably mounting the other journal to its associated support means to enable the journals, blade frame and blade to tilt about the pivot axis of the said one journal.

5. A dozer as defined in claim 4, in which:

g. adjustable means selectively pivot the journals, blade frame and blade about the pivot axis.

6. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame having a bight and two legs,

bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. the bearing means including:

1 a support blade at each side of the chassis frame,

2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,

3. a pivot fastener mounting one journal at one side of the bight to its associated support plate on a pivot axis,

4. a cooperating fastener and substantially horizontal slot mounting the said one journal at the other side of the bight to its associated support plate to enable the said one journal to move about the pivot axis, and

5. means movably mounting the other journal to its associated support plate to enable the journals, blade frame 'and blade to tilt about the pivot axis of said one journal.

A dozer for a farm tractor, comprising:

a chassis frame,

means adapted to attach the chassis frame to the tractor,

a substantially U-shaped blade frame having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

the bearing means including:

1 a support plate at each side of the chassis frame,

2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,

3. means pivotally mounting one journal to its associated support plate about a pivot axis, and

4. a cooperating fastener and substantially vertical slot mounting the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis of said one journal.

A dozer for a farm tractor, comprising:

a chassis frame,

means adapted to attach the chassis frame to the tractor, a substantially U-shaped blade frame having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. the bearing means including:

l. a support plate at each side of the chassis frame,

2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,

3. a pivot fastener mounting one journal at one side of the bight to its associated support plate on a pivot axis,

10 4. a cooperating fastener and substantially horizontal slot mounting the said one journal at the other side of the bight to its associated support plate to enable the said one journal to move about the pivot axis, and

l 5 5. a cooperating fastener and substantially vertical slot mounting the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis of said one journal.

9. A dozer as defined in claim 8, in which:

2 a jackscrew is operatively interconnected between the chassis frame and the said other journal for selectively pivoting the journals, blade frame and blade about the pivot axis of said one journal.

10. A dozer for a farm tractor, comprising:

a. a chassis frame,

'b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame having a bight and two'legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. the bearing means including:

1. a support plate member at each side of the chassis frame,

2. a journal carried by each plate member, the journal having compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,

3. one part of each journal including a flange member adjacent the associated plate member,

4. a pivot fastener mounting the flange member and plate member of one associated pair of flange and plate members, the pivot fastener providing a pivot axis at one side of the bight,

5. one of said members of said one associated pair of flange and plate members is provided with a substantially horizontal slot at the other side of the bight,

6. a cooperating fastener is carried by the other of said member of said one associated pair of flange and plate members and is received in the substantially horizontal slot to enable the associated journal to move about the pivot axis, and

7. means movably mount the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis.

11. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means,

f. the bearing means including:

1. a support plate member at each side of the chassis frame,

2. a journal carried by each plate member, the journal having Compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,

3. one part of each journal including a flange member adjacent the associated plate member,

4. means pivotally mounting one journal to its associated plate member about a pivot axis,

5. one of said members of the other associated pair of flange and plate members if provided with a substantially vertical slot, and

6. a cooperating fastener is carried by the other of said members of said other associated pair of flange plate members and is received in the substantially vertical slot to enable the journals, blade frame and blade to tilt about the pivot axis.

12. A dozer as defined in claim 11, in which:

g. the cooperating fastener is located substantially midway in the substantially vertical slot when the blade is disposed horizontally, and

h. the substantially vertical slot is of a length to permit the angular disposition of the blade on either side of a horizontal plane passed through the cooperating fastener when the cooperating fastener is located in the midway position.

13. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. meansfadapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame having a bight and two legs,

d. bearing means pivotally connecting the bight to the chassis frame,the legs being adapted to extend forwardly of front tractor wheels,

e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, i

f. the bearing means including:

1. a support member at each side of the chassis frame,

2. a journal carried by each plate member, the journal having compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,

3. one part of each journal including a flange member adjacent the associated plate member,

4. a pivot fastener mounting the flange member and plate member of one associated pair of flange and plate members, the pivot fastener providing a pivot axis at one side of the bight,

5. one of the said members of said one associated pair of flange and plate members is provided with a substantially horizontal slot at the other side of the bight,

6. a cooperating fastener is carried by the other of said members of said one associated pair of flange and plate members and is received in the substantially horizontal slot to enable the journal to move about the pivot axis,

7. said members of the other associated pair of flange and plate members are provided with substantially vertical and aligned slots, and

8. a cooperating fastener is carried by one of the said members of said other associated pair of flange and plate members and is received in the substantially vertical slots to enable the journals, blade frame and blade to tilt about the pivot axis.

14. A dozer as defined in claim 13 in which:

g. the cooperating fastener is located substantially midway in the substantially vertical slots when the blade is disposed substantially horizontally,

h. the substantially vertical slots are of a length to permit the angular disposition of the blade on either side of a horizontal plane passed through the cooperating fastener when the cooperating fastener is located in the midway position and ad ustable means IS operatlvely interconnected between the chassis frame and journal having the associated substantially vertical slots for selectively tilting the blade about the pivot axis.

15. A dozer for a farm tractor, comprising:

a. a chassis frame,

b. means adapted to attach the chassis frame to the tractor,

c. a substantially U-shaped blade frame having a bight and two legs,

d. a blade attached to the legs of the blade frame,

e. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, the bearing. means including:

1 a support plate at each side of the chassis frame,

2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,

3. means pivotally mounting one journal to its associated support plate about a pivot axis extending generally in the direction of the longitudinal axis of the dozer, and

4. means movably mounting the other journal to its associated support plate to enable the journals and blade frame to move substantially vertical about the pivot axis to tilt the blade from one end or the other, and

. hydraulic means interconnected between the chassis frame and the bight of the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the mounting of the bight in the bearing means. 

1. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame member having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. a blade member, g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members, and pivoting one end of the blade to one leg of the blade frame, h. another attachment means between the blade member and the blade frame member, said other attachment meanS being carried by one of said members, and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said other end of the blade member and said other leg of the blade frame member being attached to one of said connection points in an initial blade position, and i. an extension arm pivotally connected to the other of said connection points, said arm being held in a reserve position in said initial blade position and said arm interconnecting said other end of the blade member and said other leg of the blade frame member to angularly dispose and hold the blade member to one side of the tractor in a blade extended position.
 2. a journal carried by each plate member, the journal having compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,
 2. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame member having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. a blade member, g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members and attaching one end of the blade member to one leg of the blade frame member, said attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said one end of the blade member and said one of the blade frame member being attached to one of said connection points in an initial blade position, h. another attachment means between the blade member and the blade frame member, said other attachment means being carried by one of said members and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced front and rear connection points, said other end of the blade member and said other leg of the blade frame member being attached to one of said connection points of said other attachment means in said initial blade position, i. an extension arm pivotally connected to the other of the connection points of one of said attachment means, said arm being held in a reserve position in said initial blade position and said arm interconnecting the other end of the blade member and the other leg of the blade frame member to angularly dispose and hold the blade to one side of the tractor in a blade extended position, and j. the longitudinal distance between each associated pair of connection points being sufficient to provide a space between the blade and legs to receive the extension arm when folded to the reserve position.
 2. a journal carried by each support means, the journals pivotally connecting the blade frame to the chassis frame,
 2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,
 2. a journal carried by each plate member, the journal having compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,
 2. a journal carried by each plate member, the journal having compatible parts secured together and pivotally connecting the bight of the blade frame to the chassis frame,
 2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,
 2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,
 2. a journal carried by each support plate, the journals pivotally connecting the bight of the blade frame to the chassis frame,
 3. means pivotally mounting one journal to its associated support plate about a pivot axis extending generally in the direction of the longitudinal axis of the dozer, and
 3. means pivotally mounting one journal to its associated support plate about a pivot axis, and
 3. one part of each journal including a flange member adjacent the associated plate member,
 3. a pivot fastener mounting one journal at one side of the bight to its associated support plate on a pivot axis,
 3. one part of each journal including a flange member adjacent the associated plate member,
 3. means pivotally mounting one journal to its associated support means about a pivot axis, and
 3. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame member having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. a blade member, g. attachment means between the blade member and the blade frame member, said attachment means being carried by one of said members and attaching one end of the blade member to one leg of the blade frame member, said attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said one end of the blade member and said one leg of the blaDe frame member being attached to the rear connection point in an initial blade position, h. another attachment means between the blade member and the blade frame member, said other attachment means being carried by one of said members and attaching the other end of the blade member to the other leg of the blade frame member, said other attachment means including a pair of longitudinally spaced, front and rear connection points, spaced in the forward direction of travel, said other end of the blade member and said other leg of the blade frame member being attached to the rear connection point of said other attachment means in said initial blade position, i. an extension arm pivotally connected to the front connection point of one of said attachment means, said arm being held in a reserve position in said initial blade position and said arm interconnecting the other end of the blade member and the other leg of the blade frame member to angularly dispose and hold the blade to one side of the tractor in a blade extended position, j. the longitudinal distance between each associated pair of connection points being sufficient to provide a space between the blade member and legs to receive the extension arm when folded to the reserve position, and k. the extension arm overlapping the associated rear connection point and being attached to the associated leg when the said associated leg and blade member end are detached at the rear connection point and when the blade member end is extended by the extension arm.
 3. a pivot fastener mounting one journal at one side of the bight to its associated support plate on a pivot axis,
 3. one part of each journal including a flange member adjacent the associated plate member,
 4. a pivot fastener mounting the flange member and plate member of one associated pair of flange and plate members, the pivot fastener providing a pivot axis at one side of the bight,
 4. means pivotally mounting one journal to its associated plate member about a pivot axis,
 4. a cooperating fastener and substantially horizontal slot mounting the said one journal at the other side of the bight to its associated support plate to enable the said one journal to move about the pivot axis, and
 4. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a blade frame, d. bearing means pivotally connecting the blade frame to the chassis frame, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 4. means movably mounting the other journal to its associated support means to enable the journals, blade frame and blade to tilt about the pivot axis of the said one journal.
 4. a cooperating fastener and substantially horizontal slot mounting the said one journal at the other side of the bight to its associated support plate to enable the said one journal to move about the pivot axis, and
 4. a pivot fastener mounting the flange member and plate member of one associated pair of flange and plate members, the pivot fastener providing a pivot axis at one side of the bight,
 4. a cooperating fastener and substantially vertical slot mounting the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis of said one journal.
 4. means movably mounting the other journal to its associated support plate to enable the journals and blade frame to move substantially vertical about the pivot axis to tilt the blade from one end or the other, and f. hydraulic means interconnected between the chassis frame and the bight of the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the mounting of the bight in the bearing means.
 5. one of said members of the other associated pair of flange and plate members if provided with a substantially vertical slot, and
 5. a cooperating fastener and substantially vertical slot mounting the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis of said one journal.
 5. means movably mounting the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis of said one journal.
 5. one of said members of said one associated pair of flange and plate members is provided with a substantially horizontal slot at the other side of the bight,
 5. A dozer as defined in claim 4, in which: g. adjustable means selectively pivot the journals, blade frame and blade about the pivot axis.
 5. one of the said members of said one associated pair of flange and plate members is provided with a substantially horizontal slot at the other side of the bight,
 6. a cooperating fastener is carried by the other of said members of said other associated pair of flange plate members and is received in the substantially vertical slot to enable the journals, blade frame and blade to tilt about the pivot axis.
 6. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 6. a cooperating fastener is carriEd by the other of said member of said one associated pair of flange and plate members and is received in the substantially horizontal slot to enable the associated journal to move about the pivot axis, and
 6. a cooperating fastener is carried by the other of said members of said one associated pair of flange and plate members and is received in the substantially horizontal slot to enable the journal to move about the pivot axis,
 7. said members of the other associated pair of flange and plate members are provided with substantially vertical and aligned slots, and
 7. A dozer for a farm tractor, comprising: a. a chaSsis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 7. means movably mount the other journal to its associated support plate to enable the journals, blade frame and blade to tilt about the pivot axis.
 8. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 8. a cooperating fastener is carried by one of the said members of said other associated pAir of flange and plate members and is received in the substantially vertical slots to enable the journals, blade frame and blade to tilt about the pivot axis.
 9. A dozer as defined in claim 8, in which: a jackscrew is operatively interconnected between the chassis frame and the said other journal for selectively pivoting the journals, blade frame and blade about the pivot axis of said one journal.
 10. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 11. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 12. A dozer as defined in claim 11, in which: g. the cooperating fastener is located substantially midway in the substantially vertical slot when the blade is disposed horizontally, and h. the substantially vertical slot is of a length to permit the angular disposition of the blade on either side of a horizontal plane passed through the cooperating fastener when the cooperating fastener is located in the midway position.
 13. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, e. a hydraulic means interconnected between the chassis frame and the blade frame to pivot the blade frame substantially vertical about the pivot connection provided by the bearing means, f. the bearing means including:
 14. A dozer as defined in claim 13 in which: g. the cooperating fastener is located substantially midway in the substantially vertical slots when the blade is disposed substantially horizontally, h. the substantially vertical slots are of a length to permit the angular disposition of the blade on either side of a horizontal plane passed through the cooperating fastener when the cooperating fastener is located in the midway position, and i. adjustable means is operatively interconnected between the chassis frame and journal having the associated substantially vertical slots for selectively tilting the blade about the pivot axis.
 15. A dozer for a farm tractor, comprising: a. a chassis frame, b. means adapted to attach the chassis frame to the tractor, c. a substantially U-shaped blade frame having a bight and two legs, d. a blade attached to the legs of the blade frame, e. bearing means pivotally connecting the bight to the chassis frame, the legs being adapted to extend forwardly of front tractor wheels, the bearing means including: 